Want a free personalized recommendation for your software stack?Get yours
That Marketing Buddy
Home/API/Campaign Monitor
Campaign Monitor

Campaign Monitor API

Yes. Campaign Monitor publishes a public REST API. See campaignmonitor.com/api for pricing details.

Public REST API documentedAgent-readiness 4/10
Data from Buddy's database, auto-rechecked weekly

What is the Campaign Monitor API?

The Campaign Monitor API is a public REST interface to campaigns, contacts, segments, and automation workflows. Auth method is documented on the official API reference. No official SDK was detected, so most teams hit it directly with HTTP clients.

Typical builds: scripts that sync subscribers from your product database, engagement dashboards that combine open rate with revenue attribution, and cron jobs that pause underperforming campaigns automatically.

For agent workflows, the API is the path of least resistance until Campaign Monitor ships an MCP server. ask Claude which segments are growing fastest this quarter, have Cursor draft a 3-step welcome series for new ebook signups, and let Codex re-engage cold subscribers with personalised subject lines.

For the broader picture: Campaign Monitor review, full pricing breakdown, .

HOOK IT TO YOUR STACK

Real Campaign Monitor API calls you'll write

campaign-monitor-apirest
#List campaigns from the last 30 days
GET/v3/campaigns?since=30d&fields=name,open_rate,clicks
200 OK · 12 campaigns
Black Friday Teaseropen 42.1%
Product launchopen 38.5%
Weekly digest #12open 27.0%
Welcome flow step 2open 61.3%
campaign-monitor-apirest
#Create a new automation programmatically
POST/v3/automations
201 Created · automation_id: aut_8x
Statusdraft
Steps configured0
Estimated audience2,847
Push steps via PUT /automations/{id}/steps.
campaign-monitor-apirest
#Add a contact and tag them in one call
POST/v3/contacts
201 Created · contact_id: c_4f12
Lifecycle stagesubscriber
Tags applied1
Triggers firedwelcome-series
TMB SCORE FOR Campaign MonitorAgent fit: 4/10
Read review →

Endpoints illustrative. Confirm exact paths against the live API docs before integrating.

How much does the Campaign Monitor API actually cost?

Verify on docs

Campaign Monitor publishes an API, but per-tier gating wasn't extracted automatically.

  • Most likely scenario: API access is either included in all paid plans, or it's gated to higher tiers and we need to verify on the live docs page.
  • Until verified, treat the question "which plan unlocks the API" as open. Don't budget on the assumption it's free with the cheapest paid plan.

Campaign Monitor subscription pricing

PlanMonthlyAnnual / mo
Free
Lite$1,170$1,053
Essentials$2,790$2,511
Premier$15,390$13,851
EnterpriseContact sales

⚠ Per-tier API gating not yet structured for Campaign Monitor. Confirm which plans unlock API access on the live docs.

Source: campaignmonitor.com/pricing. Verified 2026-06-07.

API at a glance

Auth method
SDK languages
OpenAPI spec
Webhooks
Structured outputs

What you can build with the Campaign Monitor API

Three personas, three different shapes of build. Pick the row that matches how you actually ship.

SOLO DEV / FOUNDER

Glue Campaign Monitor into your daily workflow

  • Pull a digest of campaign performance into your morning Slack
  • Trigger a one-off backfill when something looks off
  • Pipe data into your own SQLite for ad-hoc queries
Effort: A weekend, one Node or Python script
AGENCY / CONSULTANT

Sell Campaign Monitor reporting at scale

  • White-label Campaign Monitor data into client-branded dashboards
  • Run scheduled multi-account reports without logging into the Campaign Monitor UI
  • Cross-reference with the rest of the client's stack (CRM, analytics, ad spend)
Effort: 1-2 weeks, hits multi-tenant auth quickly
IN-HOUSE ENGINEER

Production pipelines for Campaign Monitor

  • Real-time sync into your warehouse on a cron
  • Custom alerts the dashboard's built-in alerting can't express
  • Backfill + idempotency handling for Campaign Monitor data older than the dashboard exposes
Effort: Multi-week project, expect rate-limit tuning

Quickstart template

# Starter template — endpoint paths and SDK package names come from
# the Campaign Monitor API docs: https://www.campaignmonitor.com/api/

curl -X GET "https://www.campaignmonitor.com/<your-endpoint>" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Accept: application/json" | jq .

Template only. Endpoint paths, exact base URL, and auth header format come from campaignmonitor.com/api.

Limits and gotchas

  • No OpenAPI spec — you write typed clients by hand or use a third-party generator on the docs HTML.
  • No official SDK detected. Plan on hitting the API directly with your HTTP client of choice.
  • Rate limits: always read the docs page before scaling — the published limit is usually lower than the practical one and overages can be expensive.
  • No-code fallback: Zapier and Make.com cover the common triggers if you want to skip writing API code for simple flows.
4/10

Agent-readiness verdict

Skip for agent workflows. Campaign Monitor has public API documentation but no MCP server, OpenAPI spec, or SDK support, leaving agents unable to integrate meaningfully. The lack of webhooks and structured outputs further limits real-time automation potential.

Public API with docs

Campaign Monitor API FAQ

Does Campaign Monitor have a public API?+
Yes — REST API at campaignmonitor.com/api.

Sources

Joonas Rotko
Joonas RotkoAuthor & Founder of That Marketing Buddy

10+ years in digital marketing. I review marketing software for AI-stack fit: real pricing, MCP and API support, and how cleanly each tool drops into an AI agent workflow, cross-checked against verified data and real user feedback.

Campaign Monitor

Try Campaign Monitor
WEEKLY NEWSLETTER

The marketing tools worth your money, scored for AI agent readiness

Every week I score the tools for MCP, API, and agent-readiness, then email you the ones that actually deliver, what plugs into Claude and Cursor, the pricing changes, and what to skip. No fluff, no daily spam.

Join for free. One email a week, unsubscribe anytime.